Structure and properties of CaO-MgO-SiO₂ inorganic glass fiber with additives (Al₂O₃, Y₂O₃)

Abstract

Structure, crystallization and dissolution properties of CaO-MgO-SiO₂ inorganic glass fiber in the presence of additives (Al₂O₃, Y₂O₃) were investigated by DTA, XRD, FTIR and ICP-AES techniques. The results show that with the addition of Al₂O₃ and Y₂O₃, the glass network structure is strengthened and the precipitation of crystals is inhibited for heat-treated fibers. Compared with Y₂O₃ doped fibers, Al₂O₃ presents more significant effects on the enhancement of silica network and the inhibition of crystallization in fibers. As for dissolution properties in physiological fluids, though the weight losses, changes of pH values and leached ions concentration lower slightly with the addition of Al₂O₃ and Y₂O₃ for the intensified network structure, and fibers still present high dissolution rates.

Keywords

glass fiber / crystallization / dissolution

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